/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import DAO.ArtistDAO;
import DTO.artist.Artist;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import xmlutils.XMLGenerator;

/**
 *
 * @author tiwtiger
 */
public class ArtistManage extends HttpServlet {

    
    private final String artistManage = "adminManageArtist.jsp";
    private final String errorPage = "errorpage.jsp";

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String artistName = request.getParameter("txtArtistName");
            String biology = request.getParameter("txtBiology");
//            String realPath = getServletContext().getRealPath("/");
//            String filePath = realPath + xmlPath;
//
//            Document doc = xmlutils.XMLUtils.parseDOM(filePath);
//            XPathFactory xpf = XPathFactory.newInstance();
//            XPath xp = xpf.newXPath();
//
//            String exp = "//*[local-name()='Username' and text()= '" + artistName + "']";
//            Boolean result = (Boolean) xp.evaluate(exp, doc, XPathConstants.BOOLEAN);
//
//            if(!result){
//                Element artist = doc.createElement("Artist");
//
//                Element artistname = doc.createElement("ArtistName");
//                artistname.setTextContent(artistName.trim());
//                artist.appendChild(artistname);
//
//                Element biologyElement = doc.createElement("Biology");
//                biologyElement.setTextContent(biology.trim());
//                artist.appendChild(biologyElement);
//
//
//            }
            Artist artist = new Artist();
            artist.setArtistName(artistName.trim());
            artist.setBiology(biology.trim());
            artist.setArtistImageSRC("");
            artist.setSubscriberNumber(BigInteger.ZERO);
            artist.setArtistViews(BigInteger.ZERO);

            ArtistDAO artistDAO = new ArtistDAO();
            artistDAO.add(artist);
            XMLGenerator.generateArtistsXML();
            RequestDispatcher rd = request.getRequestDispatcher(artistManage);
            rd.forward(request, response);
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
